The Transient Dynamic Analysis Of FPSO

The FPSO is the abbreviation of Floating Production Shortage and Offloading, opposite in offshore the deep-sea oil-field homework environment is bad, under the condition of many, the FPSO has become to only one economic method in oil exploring.This text mainly is to make use of a software of ANSYS to carry on time process analysis to whole model of FPSO, among them include the optimization to the whole model of FPSO, make use of the sub- structure provided by the ANSYS to carry on the simplification to the whole model of FPSO, makes use of the modal analysis to compute all mode shape we used, making use of the mode superposition method to carry on time process analysis finally.This thesis mainly aims at the whole model of large-scale FPSO .The model of this FPSO includes 264600 elements, 207028 nodes.Include in a specific way:1 Optimization of whole model of FPSO: Parts of elements shapes of model not agree with the request of the ANSYS, so carry on the modification to the model, make it the contented ANSYS solves the request.2 Make uses of the sub- structure theories to this model to carry on the simplification: Select the sub- structure, and then assemble sub- structure in whole model to carry on the operation calculation.3 Make use of the mode superposition method to carry on the time process analysis to the whole model of FPSO: Carry on the modal analysis to the whole model, then carry on the mode superposition method.Include in a specific way: Make use of the function loads to apply loads on model, carry on the modal analysis, and carry on the transient dynamic analysis .Conclusion: Making use of the mode superposition method in the ANSYS to carry on the transient dynamic analysis to the whole model of FPSO is viable, the result is dependable.